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tn5250 emulates a 5250 terminal or printer over telnet, for connecting to IBM Power Systems, iSeries and AS/400 computers running IBM i, i5/OS and OS/400. It runs on any Unix or Windows system.
Note that this project is now on GitHub at https://github.com/tn5250/tn5250
Qodem is a a terminal emulator that resembles the BBS-era Qmodem. Includes phonebook, scrollback, capture, X/Y/Zmodem, Kermit, ANSI (+ music) / Avatar / VT102 / Linux emulation, Unicode, and keyboard macros. Connects over serial, ssh, telnet, rlogin.
The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another. The HUB for communications (hub4com) allows to receive data and signals from one COM or TCP port, modify and send it to a number of other COM or TCP ports and vice versa.
C library which allows to easily setup a VT52/VT100/ANSI/ECMA048/AVATAR telnet server. Can handle multiple clients with a simple API, main features: minimal bandwidth consumption, optimized network architecture, console color support.
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PocketPuTTY is a Pocket PC port of famous PuTTY (SSH client). Smartphone support is also planned.
The long-term goal is to get PocketPuTTY included into official PuTTY development tree.
gtermix is a gtk+ telnet client intended for calling BBSes. It utilizes a custom VGA textmode emulating terminal widget that allows it to accurately render bulletin board systems as they were in DOS terminal programs.